Read-mostly pattern & EJB-QL question when using Weblogic 8.1

Question

I want to use the same implementation of an CMP entity bean for the
read-mostly pattern in BEA Weblogic 8.1 (means for the reader and the
writer class).
Therefore my ejb-jar.xml contains the following statements:
<ejb-name>MyBeanReadOnly</ejb-name>
<local-home>mypackage.MyBeanLocalHome</local-home>
<ejb-name>MyBean</ejb-name>
<local-home>mypackage.MyBeanLocalHome</local-home>
The weblogic-ejb-jar.xml and weblogic-cmp-rdbms-jar.xml have the proper
changes.
I can deploy this bean & for the corresponding session bean binding
and calling methods works for the (virtual) read-only and read-write
entity beans.
When we are using Xdoclet and ejb.finder methods e.g.
@ejb.finder
signature="java.util.Collection findAllValid(java.util.Date date)"
result-type-mapping="Local"
query="SELECT DISTINCT OBJECT(u) FROM MYTABLE AS u
WHERE (?1 >= u.validFrom) AND ((u.validUntil IS NULL)
OR (?1 <= u.validUntil))"
the compilation and packaging runs well (as usual).
During the deploy to Weblogic 8.1 we get errors, because the
implementation of MyBeanReadOnly's findAllValid(...) should return
objects of type MyBeanReadOnly instead of MyBean.
Is there a way to solve this problem
- and not write seperate reader and writer classes like
the Weblogic 5.1 sample implementation?
- and not use the CMP optimistic locking?
Thanks for any further information.
Wolfgang

Answer 1

surya jeedigunta wrote:
We are using Weblogic 8.1 SP2 and our Oracle Database is of version 9.2.0.5.
I created user ID 'testa' in the database which owns all the objects.
I created another userID 'testb' which has privileges to read, modify and delete data from tables owned by testa.
I created public synonyms for all the objects owned by testa.
I set the userid 'testb' and password in weblogic administrator window and set the same in reg.xml file also.
Now when I tried to install the application, I got the following errors:
BEGINNING INSTALLATION
START INSTALLING FORMS SECTION
Installing Form ./dataform/EventHistory.xml...<ErrorStack>
<Error>
<Code>FORM_045</Code>
<Msg><![CDATA[ Form "Form" schema lacks some required columns:
Field=ID column=ID does not exist in table=QSTForm
Field=Name column=Name does not exist in table=QSTForm
Field=Version column=Version does not exist in table=QSTForm
Field=Content column=Content does not exist in table=QSTForm
Field=LastModified column=LastModified does not exist in table=QSTForm ]]></Msg>
</Error>
<Error>
<Code>FORM_7</Code>
<Msg><![CDATA[ Failed to bind FDT columns, exception com.quovadx
.bpms.core.CWException: (FORM_045) Form "Form" schema lacks some required column
s:
Field=ID column=ID does not exist in table=QSTForm
Field=Name column=Name does not exist in table=QSTForm
Field=Version column=Version does not exist in table=QSTForm
Field=Content column=Content does not exist in table=QSTForm
Field=LastModified column=LastModified does not exist in table=QSTForm ]]></Msg>
</Error>
My question is :
does weblogic 8.1 works when I use public synonyms and user id other than the schema owner ID?
I would appreciate if somebody could help me with this.
Thank YouHi. I wish I could help you more, but so far, from what symptoms you've shown us,
this is a purely internal Oracle issue to do with what your second user sees or
can access. The fact that the user is logging in via JDBC or through WebLogic is
irrelevant.
Joe